Về cách phát


tải về 16.15 Mb.
Chuyển đổi dữ liệu25.11.2019
Kích16.15 Mb.
1   ...   137   138   139   140   141   142   143   144   ...   243


Exercise 1: Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

Hundreds of thousands of persons each year fall to prey some types of cancer; but new methods of radiation therapy have enabled doctors to save more lives than ever before. Medical researchers have developed several experimental forms of this time- honored cancer treatment that seem effective in fighting the diseases.

One promising approach involves exposing cancer cells to radiation by implanting a radioactive source directly into the malignant tissue. This progress greatly increases the dosage and thus the effectiveness of the treatment. Another technique utilizes drugs to make cancer cells more susceptible to the effects of radiation and to make normal cells more resistant. Certain drugs are able to neutralize the genetic framework of cancer cells, thus making them more easily affected by radiation. Both techniques have been more positive results in the treatment of inoperable brain tumors.

These and other methods have helped to raise the recovery rate for cancervictims from 30 per cent 40 years ago to around 50 per cent today. This is encouraging news for those who fall prey to one of the world’s leading killers.

  1. What is the author’s main purpose in the passage?

    1. To provide statistical information on cancer.

    2. To argue for new methods of cancer treatment,

    3. To illustrate new techniques of radiation therapy.

    4. To give the result of recent cancer research.

  1. According to the passage, which of the following is true about radiation therapy?

    1. There is only one effective form of this therapy.

    2. It saves millions of lives each year.

    3. It is an accepted method of cancer treatment.

    4. It causes the incidence of cancer to rise dramatically.

  2. The word “malignant” most closely means .

    1. disease B. experimental

C. treated D. poisonous

  1. According to the passage, radiation therapy is most effective when .

    1. drugs are used to relax the cancer patient

    2. the cancer is directly exposed to the radioactive material

    3. it is used on as many patients as possible

    4. the cancer cells are resistant to treatment

  2. It can be inferred from the passage that .

    1. improvements in cancer treatment during the last half century have been relatively ineffective

    2. the number of deaths caused B, Cancer has decreased substantially

    3. fewer people are susceptible to the effects of cancer

    4. scientists are close to eliminating cancer entirely

Поделитесь с Вашими друзьями:
1   ...   137   138   139   140   141   142   143   144   ...   243

Cơ sở dữ liệu được bảo vệ bởi bản quyền ©tieuluan.info 2019
được sử dụng cho việc quản lý

    Quê hương